Defrosting Control for a Warehouse Refrigeration System
碩士 === 元智大學 === 工業工程研究所 === 87 === Defrosting Control for a Warehouse Refrigeration System Student : H-T Huw Advisor : Dr. Yu —Chuen Yeh ABSTRACT Frost layer less than0.5mm will help the heat transfe r of evaporator in the ware...
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1999
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ndltd-TW-087YZU000300432015-10-13T11:50:27Z http://ndltd.ncl.edu.tw/handle/41287297633383354273 Defrosting Control for a Warehouse Refrigeration System 冷凍庫房系統節約能源除霜控制研究 H-T Huw 胡鴻才 碩士 元智大學 工業工程研究所 87 Defrosting Control for a Warehouse Refrigeration System Student : H-T Huw Advisor : Dr. Yu —Chuen Yeh ABSTRACT Frost layer less than0.5mm will help the heat transfe r of evaporator in the warehouse refrigeration system. However, if the frost layer is too thick, it could become a heat insulator which will reduce the heat exchange and refrigeration efficiency. If the frost formation is not properly controlled and continues to grow, the fan could be stuck by the frost or ice and fail to spin. It will cause overloading or burning of fan motor, as a result, the refrigeration system will be completely failure. A proper selection of defrosting method and precise control of defrost cycle will significantly help the warehouse refrigeration efficiency and energy saving. Using a temperature sensor to monitor the frost layer thickness, a pressure sensor at the low pressure end of compressor to monitor the frost growth, a remote PC BASED data acquisition system, PC network, and a graphical user interface PID and control system, this study is to develop a 3-phase SCR driver control system to closely control the defrosting, with an objective of saving energy and improving warehouse refrigeration efficiency. Key Word : PID、SCR、 PC BASED、Refrigeration。 Yu-chuen Yeh 葉若春 1999 學位論文 ; thesis 72 zh-TW |
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碩士 === 元智大學 === 工業工程研究所 === 87 === Defrosting Control for a Warehouse Refrigeration System
Student : H-T Huw Advisor : Dr. Yu —Chuen Yeh
ABSTRACT
Frost layer less than0.5mm will help the heat transfe r of evaporator in the warehouse refrigeration system. However, if the frost layer is too thick, it could become a heat insulator which will reduce the heat exchange and refrigeration efficiency. If the frost formation is not properly controlled and continues to grow, the fan could be stuck by the frost or ice and fail to spin. It will cause overloading or burning of fan motor, as a result, the refrigeration system will be completely failure. A proper selection of defrosting method and precise control of defrost cycle will significantly help the warehouse refrigeration efficiency and energy saving. Using a temperature sensor to monitor the frost layer thickness, a pressure sensor at the low pressure end of compressor to monitor the frost growth, a remote PC BASED data acquisition system, PC network, and a graphical user interface PID and control system, this study is to develop a 3-phase SCR driver control system to closely control the defrosting, with an objective of saving energy and improving warehouse refrigeration efficiency.
Key Word : PID、SCR、 PC BASED、Refrigeration。
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author2 |
Yu-chuen Yeh |
author_facet |
Yu-chuen Yeh H-T Huw 胡鴻才 |
author |
H-T Huw 胡鴻才 |
spellingShingle |
H-T Huw 胡鴻才 Defrosting Control for a Warehouse Refrigeration System |
author_sort |
H-T Huw |
title |
Defrosting Control for a Warehouse Refrigeration System |
title_short |
Defrosting Control for a Warehouse Refrigeration System |
title_full |
Defrosting Control for a Warehouse Refrigeration System |
title_fullStr |
Defrosting Control for a Warehouse Refrigeration System |
title_full_unstemmed |
Defrosting Control for a Warehouse Refrigeration System |
title_sort |
defrosting control for a warehouse refrigeration system |
publishDate |
1999 |
url |
http://ndltd.ncl.edu.tw/handle/41287297633383354273 |
work_keys_str_mv |
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